Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I came across this one Debian Linux installation (6.0.6), and examining its /etc/rsyslog.conf, I see configuration lines like this:

auth,authpriv.*                 /var/log/auth.log
*.*;auth,authpriv.none          -/var/log/syslog

I can't find anything about prepending dashes to the file action in rsyslog.conf(5), and what the meaning of it might be, and would like to know what they actually do.

share|improve this question

Googled this a bit more, and found: In essence, it means to not synchronize the log file to disk every time there is a write, if synchronization behavior is on by default.

It is stated that since v3 the default behavior is not sync, and it's possible to change this by specifying "$ActionFileEnableSync on/off".

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.